If one person doesn't want to have sex, you simply don't ask them out if that's your main wish for that person. That seems simple enough. If she says no and that doesn't fit the other person's wishes, then the answer is simple. Don't date that person again. If, on the other hand, this mythical athlete is truly looking for a relationship with someone, sex shouldn't be the primary criterion.

In a dating relationship, as in all relationships, the two people are their own agents. Both have an equal right to determine their own wishes and actions. That is always true. In casual dating situations, there are no obligations, except to respect the other person's wishes. That seems simple enough to understand.

Sex is one aspect of life, and it's an aspect that takes up very little of a person's actual life. It's never an essential thing. It's a desire, not a mandate. If a person believes that sex is the primary object of relationships, then that person still has some growing up to do, in my opinion.